Why would that be a problem? I think everyone should be testing when they travel regardless to or from our vaccination status.
It would be a problem because UK citizens are now being discriminated against on the basis that we are no longer members of the European Union - the choice we made has left us actively worse off to pursue the life we choose.
There is no fundamental need for
private sector testing to be used for travelling, at significant cost - when most of us have a pile of lateral flow tests in our homes, which could serve the purpose for travel if testing really is needed.
There is
no scientific need to test travellers between France and the UK. The vaccination rate in both countries is over 80%. The damage to the travel industry is ongoing, and these quick-fire reactions are doing nothing to support it.
I have no issue with testing being in place between countries of vastly differing vaccination levels, or to/from countries with variants of concern emerging.
This is not the case between the UK and most of Western Europe.
On a more personal level, My parents live in France, and the ongoing hurdles and difficulties that we are having to navigate now just to get together are, through Brexit due to the 90-day rule, Covid and a combination of both - absolute galling. First it was residency rights post-Brexit, then it was international travel bans and limits, now it's little tweaks here and there - all making it more difficult.